watchOS 5.2 (build 16T225) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-03-27T22:03:46Z. The update package is 873.94 MB. This is a delta (partial) update that requires 4.2.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ea64fd5b457f6acb2e13d28a15c2360a8029fc4d.zip.